My copy of the FA 35mm was actually a tiny bit sharper than the 31mm, but the 31mm had a nicer bouquet (and it was sharp too).

Both are very good lenses. Your money on the 35mm would be well spent and the same holds for the 31mm (if MIJ), which was my best and most expensive lens ever. Only the thought that it could be stolen or that it could fall to the ground (children :-)) made me sell it.

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A.

thanks Alwina H

in fact I lean to the ltd but some in pentax forums calld fa 35 the poor man of fa 31.although it is expensive in my local store about 800$